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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/ProbeListener.java @ 22219:1c0f490984d5

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Merge with f47b601edbc626dcfe8b3636933b4834c89f7779
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Wed, 16 Sep 2015 15:36:22 -0700
parents dc83cc1f94f2 3aad794eec0e
children 0fb3522e5b72
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1 /*
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2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.instrument;
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26
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27 import com.oracle.truffle.api.nodes.Node;
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28 import com.oracle.truffle.api.source.Source;
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29
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30 /**
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31 * An observer of events related to {@link Probe}s: creating and tagging.
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32 */
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33 public interface ProbeListener {
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34
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35 /**
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36 * Notifies that all registered {@link ASTProber}s are about to be applied to a newly
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37 * constructed AST.
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38 *
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39 * @param source source code from which the AST was constructed
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40 */
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41 void startASTProbing(Source source);
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42
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43 /**
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44 * Notifies that a {@link Probe} has been newly attached to an AST via
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45 * {@link Instrumenter#probe(Node)}.
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46 * <p>
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47 * There can be no more than one {@link Probe} at a node; this notification will only be
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48 * delivered the first time {@linkplain Instrumenter#probe(Node)} is called at a particular AST
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49 * node. There will also be no notification when the AST to which the Probe is attached is
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50 * cloned.
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51 */
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52 void newProbeInserted(Probe probe);
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53
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54 /**
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55 * Notifies that a {@link SyntaxTag} has been newly added to the set of tags associated with a
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56 * {@link Probe} via {@link Probe#tagAs(SyntaxTag, Object)}.
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57 * <p>
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58 * The {@linkplain SyntaxTag tags} at a {@link Probe} are a <em>set</em>; this notification will
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59 * only be delivered the first time a particular {@linkplain SyntaxTag tag} is added at a
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60 * {@link Probe}.
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61 * <p>
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62 * An optional value supplied with {@linkplain Probe#tagAs(SyntaxTag, Object) tagAs(SyntaxTag,
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63 * Object)} is reported to all listeners, but not stored. As a consequence, the optional value
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64 * will have no effect at all if the tag had already been added.
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65 *
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66 * @param probe where a tag has been added
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67 * @param tag the tag that has been newly added (subsequent additions of the tag are
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68 * unreported).
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69 * @param tagValue an optional value associated with the tag for the purposes of reporting.
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70 */
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71 void probeTaggedAs(Probe probe, SyntaxTag tag, Object tagValue);
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72
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73 /**
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74 * Notifies that the application of all registered {@link ASTProber}s to a newly constructed AST
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75 * has completed.
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76 *
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77 * @param source source code from which the AST was constructed
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78 */
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79 void endASTProbing(Source source);
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80
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81 }